Shaving mechanism



Oct. 10, 1950 w. J. NEIDIG 2,524,822

SHAVING MECHANISM Filed March 20, 1946 2 Sheets-Sheet 2 Inventor; t

Patented a. [10, 1950 UNITED STATES PATENT OFFICE 2,524,822 SHAVINGMECHANISM William Jonathan N eidig, Napoleon, Ohio Application March 20,1946, Serial No. 655,813

The invention herein described relates to the class of shavingmechanisms in which movable and stationary, cutting elements cooperatein a shearing action, more particularly when the movable element isrotary.

In practice, as is well known, power-driven shaving mechanisms commonlyemploy some form of reciprocating actuation, rather than rotary, themovable cutting element being oscillated rapidly to and fro in slidingcontact with the stationary. This sliding contact is commonly maintainedby means of yielding spring pressure or its equivalent, the pressurebeing directed against one of the cutting elements to urge it toward theother, as in the familiar hair clipper family. The heavier the cutting,the stronger the spring pressure needed. For the cutting edges ofshearing cutters necessarily slide past each other at different levelsand the cutting action tends to separate them. The spring pressure mustbe strong enough to hold the cutters in contact under all the stressesof use; otherwise the cutting action will now and then spring themapart, and they will draw the beard-ends or hair between them and causepain.

Such shearing elements must likewise be held in contact by adequatemeans when one of them is rotary, and for the same reason. The stressesof use vary greatly. Cutting edges get dull, in-

creasing all stresses. The spring pressureemployed must be strong enoughto withstand-all these. Yet at desirable rotary speeds'such pressure maycause excessive friction and objectionable heat. This practicalconsideration of the heat of friction is one of the factors making forthe larger use of reciprocating actions, for in them the to-and-frothrow of the movable cutting element is small and the friction factorlow. Even in them the heat of friction in some cases may becomeobjectionable.

One of the objects of my invention is'to reduce this rotary frictionfactor, namely by providing pressure-forces to hold the shearingelements in contact that automatically vary with their need,

instead of remaining at a predetermined constant 12 Claims. (Cl. 30-43)2 the force resisted, without employing pressureforces at all.

Another of my objects, in uses where springpressed cooperating cuttersare employed, is to reduce the spring pressure required, or itsequivalent, by combining my variable pressure and variable resistancedevices with the springpressed devices.

By attaining these objects I attain other objects, namely that ofincreasing the life and efiiciency of cooperating shearing cutters byreductrated in the accompanying drawings.

ing the wear upon them, that of increasing the cutting speed of ashaving mechanism employing rotary cutters, and that of reducing thepower needed for the operation of such a mechanism and therefore thesize of the motor.

Among my further objects is to provide a construction for a shavingmechanism whereby the stationary cutting member can be readily liftedback from the rotary for inspection, cleaning or blade renewal purposes,and as readily replaced, at a touch, without adjusting, and to provide alatch for such a construction latching it against accidentaldisplacement, thereby increasing the convenience and safety of themechanism as a whole. a

As one of my objects, I also provide an improved blade-replacingconstruction, and an improved form of cutting blade for ready removal orreplacement by the average user.

Still a further object is to provide an improved rotary cutting andsupporting member in a construction that is economical to manufactureand effective in use.

Other objects are as hereinafter explained.

I attain these objects through the invention described herein,embodiments of which are illus- In these- Fig. 1 is a plan view of anembodiment shown as connected to a common form of power drive.

Fig. -2 is a sectional end, elevation of parts of the same, greatlyenlarged, on the line 22, Fig. 1.

Fig. 3 is an end view of the same, similarly enlarged.

Figs. 4 and 5 illustrate other forms of parts shown in Fig. 2, on thesame scale and in similar sectional end elevation, with portions of thestructure removed or broken away.

Fig. 6 is adetail' view, partly broken away or in section, of the rotarymember employed in the earlier figures to illustrate the invention, onthe same scale as Figs. 2 to 5.

Fig. 7 is a detail View, not so greatly enlarged, of the removablestationary cutting blade shown in Figs. 2 to 5.

Figs. 8 to 11 are representations, chiefly diagrammatic, illustratingthe action of the mechanism shown in the earlier figures.

Figs. 12 and 13 illustrate other forms of rotary cutting member I.

The mechanism ilustrated in the drawings embodies cutting andskin-supporting constructions described and claimed more broadly in myUnited States Patent No. 2,367,686, dated January 23, 1945, and in myco-- pending application for patent, Serial No. 572,807, filed January15, 1945, now abandoned.

The invention described herein comprises cooperating rotary andstationary cutting members having cutting positions in shearingadjacence, and it comprises positioned devices supporting the stationarymember in special Ways.

In the drawings, a rotary cutting member is indicated at I and astationary cutting member at 2, the rotary member being driven by aconventional motor the casing of which is indicated at 3 and theelectrical connections at 4. Rotor shaft 5 of the motor, journaled incasing 3, is extended into or connected drivingly to axle 6 of member I,axle 6 being journaled at one end in frame-plate 7, attached upon casing3, and at the other end in frame-plate 8. Frame-plates I and 8 areconveniently combined with strut 9 through bolt 59 and nut II to form aframeextension upon casing 3 for the support of the shaving mechanismproper, key-pin I2 entering recesses in strut 9 to maintain the parts inposition.

Rotary cutting member.-Rotary member I may take many forms. In thedrawings, one form is shown in Figs. 1 to 6, a variant upon this in Fig.11 (partly diagrammatic), another form in Fig. 12, still another in Fig.13. In all of the forms shown use is made of peripheral cutters andperipheral bearers, and of beard-receiving recesses spacing the bearers.The illustrations chosen exhibit what I regard as preferred forms,rather than the range of forms possible, which do not necessarilyinclude cutters or bearers of the special forms shown, or bearers atall.

In the embodiments of the invention illustrated in Figs. 1 to 6, rotarycutting member I, of cylindrical contour, is constructed having a bodyportion I3 attached upon axle 6 as by moulding, the

body portion being fashioned of a material suitable for the use, such asdie-casting metal or plastic. In its periphery are shown cutters I andskin-supporting bearers I5, the bearers being spaced by narrowbeard-receiving recesses I6, and being of even height with the cutters.Cutters I4, fashioned of hard material before assembling, have the formof rectangular teeth or serrations along the edge of toothed blade I'I,blade I? being embedded longitudinally in body portion I3 by moulding orotherwise. Bearers I5 are fashioned of elongated hard material such asmusic wire, preferably of rectangular section, and are assembled in thenotches I8 between cutters M. In the arrangement shown in Fig. 11 onlyone of the notched blades bears serrations of peripheral height, theremaining blades, indicated at I7 serving as bearer supports and not ascutters. The construction is fine-ground after assembling to smooth,polished peripheral surfaces for light sliding contact with the skin andwith the stationary cutting edge. The disposition of parts is such thatbearers I5 form a helical pattern of low pitch in the periphery ofmember I, spaced by cutters It; and recesses I6, and cutters I4 haveangular positions giving them 4 cutting paths that overlap. Theconstruction gives bearers I5 a distributed supporting contact with theskin and with the stationary cutting edge, and enables them throughtheir sliding action to assist in guiding beard-ends into recesses I6for cutting.

Cutters Hi and bearers I5 of rotary member I shown in Fig. 12 are ofeven height and perform the same described functions as cutters I4 andbears I5. Cutterslt and bearers I5 of rotary member I shown in Fig. 13also perform .the same described functions as cutters I4 and bearers I5.

Stationary cutting member.The cooperating stationary cutting member 2 ofthe mechanism is constructed havin a longitudinally-extending cuttingedge adapted to engage shearingly with cutters I4, I4 or I4 when incuttin position. In the drawings the cutting portion of member 2 isshown as detachable for ready replacement, having the form of areplaceable blade of special design. This blade portion is indicated at2B, and the cutting edge thereon at 2i. Blade portion 20 in thisconstruction is combined upon supporting cross-portion 22 of member 2through the clamping action of finger-nuts 23 and threaded studs 24, thestuds projecting rearwardly from cross-portion 22 of member 2 throughslots 25 in the blade. The slotted form of openings 25 permits theremoval of the blade without removing the nuts. Blade 20 when assembledon cross-portion 22 acts as a unit with other portions of member 2 as ifconstructed integrally therewith. Finger-extensions 26 on either end ofthe blade facilitate its handling, enabling a blade to be removed orinserted in the dark, by feel alone. The angular construction of theblade adds to its usefulness. It is constructed having an L section, andcomprises a plate-like edge portion 21 joined along the heel upon aplate-like downstanding portion 28. The construction provides a narrow,stiff, inexpensive, easily-handled cutting edge for member 2 that isreplaceable with ease by any average user. While the replacement featureadds greatly to the usefulness of the mechanism as a whole, it is notessential to the cutting action.

Fleming devices.The mechanism that cooperates with the rotary andstationary cutting members to perform my novel pressure functionscenters upon certain movement-affording supporting constructionsaffording a special movement broadwise by the stationary cutting edge.These will be described. The constructions are not limited to thoseshown in the drawings, but are illustrated by them. As an example, theflexing constructions of the drawings in each case afford movementbroadwise by the cutting edge in an arc, whereas the movement need notfollow an arched path. By movement broadwise is meant a movement by thecutting edge as about an axis parallel thereto. The flexingconstructions shown in Figs. 1 to 3 have the form of axle-and-bearingdevices, the bearings 30 of which have positions on arms 32, shaft 3|serving as axle. The flexing devices shown in Fig. 4 are thin,strap-like portions 3I of forwardly-extending arm supports 32 fashionedof readily? flexible tension-resisting material like thin sheet metal.In Fig. 5 the flexing structure i shown as resembling that of a pin orstub axle nested in the end of a chain-link. The constructions affordingmember 2 the required movement broadwise may operate from a number ofpositions, within narrow limits. Forreasons that will be 32 (Fig. 4) orarms 32 (Fig. 5). Whatever form they take, or whatever their position,the object of the movement-affording devices is to afford a short, free,defined movement broadwise by the stationary cutting edge in a pathmeeting the pathof cooperating rotary cutters obliquely between certainangles.

The embodiment shown in Figs. l to 3, with its forwardly-extending armsupports 32 journaled upon shaft 3 I, will illustrate theconstruotionand action of the mechanism. Shaft 3| is attached at eitherend upon frame-plates l and 8, in a position forward of the shearingline, and arms 32 through bearings 3|] are journaled upon it as upon anaxle. Arms 32 are attached upon the ends of supporting portion 22 ofmember 2. The

position of shaft 3| is such that edge 2| is afforded movement broadwisein the path indicated at 33, which meets the path 34 of peripheralcutters I4 at the acute angle of 55 or 60, the

vertex of the angle marking the shearing line and lying in the directionof rotation of the peripheral cutters. Any movement of edge 2 I, nomatter how small, either toward or away from cutting position, must bemade in this path. The path of cutters l4, and of cutters i4 and I6 aswell is indicated at 34 in Fig. 11. Work material, greatly enlarged, isalso shown in Fig. 11, being indicated at 35. I

The mechanism described cooperatesto perform functions that will beexplained.

1. Variable contact pressane-In a shearing action between any movableand stationary cutting members a cutting force is exerted by the movablemember upon the material being cut, and through that material upon thesupporting adjacent cutting edge of the stationary member. Cuttershaving sharp edges require less cutting force to operate than dull ones,thin stands of beard less force than thick. This is true of the cuttingforces exerted through peripheral cutters l4, and it is true of workmaterial 35 and stationary cutting edge 2|. The stationary cutterreceives the exact cutting pressure expended in cutting the material,and no more. After the cut is made no further cutting pressure istransmitted.

The devices shown provide means to convert variable cutting pressureexerted by cutters i4 upon work material 35 into pressure variablypressing cutting edge 2| toward said cutters. They act as follows: Thecutting force exerted by cutters M is transmitted through work material35 to cutting edge 2|. Cutting edge 2| being movable obliquely broadwisetoward cutters M in path 33, and in that path only, and the pressureupon cutting edge 2| being exerted in a direction tending to move ittoward cutters I4, since it is exerted off center of the axle of fiexion3|, edge 2| is urged more strongly or less strongly into shearingcontact by a pressure that varies with the cutting force exerted, thatis to say that varies with the need. Whether great or small, thepressure thus provided will automatically reduce the need for a constantspring pressure, or

eliminate it, and therefore reduce the friction of contact and its heat.

2. Range of oarz'ati0n.The ratio of pressure transmitted to thatexerted'by cutters I4 is itself variable, although not automatically,being greater at the lower angles between paths 33 and 34, lower at thehigher. The angles of 55 or 60 shown in the drawings may be increasedfor some uses almost to a right angle of and still remain effective. Forother use they may be reduced to 20 or lower, through the use of hard,polished, rigid materials, at increased expense. In no case will theangle be so low as to cause seizing.

3. Intermittent pressure-Not only do my devices automatically convertvariable cutting pressure into pressure variably urging the cuttingmembers together, but since the cutting pressure is intermittentlyexerted, the transmitted pressure is automatically applied at intervalsonly, still further reducing the friction of contact. The feature hasthe further effect of sharply decreasing the angles, from high tolow, atwhich a seizing action may occur, thereby increasing the range of anglesavailable.

4. Variable resistance featare.The further function performed by themechanism is distinct from any of those described, but cooperates withall of them in accomplishing the common objects. The devices provide anautomatic, varying resistance to the separation of the cutting membersduring the cutting action, independently of the varying and intermittentpressures described thereby reducing the need of any pressures.

The manner in which the mechanism operates to do this can best beexplained through an illustration. Attention is directed to the positionof parts as shown in Fig. 11, in which the rotation of member is stoppedat the precise moment when cutters l4 have pressed work material 35tightly against cutting edge 2| but have not yet sheared it off. Supposethat instead of beard the work material be regarded for the moment asconsisting of incompressible hard steel wire of the same diameter, andthat the mechanism is of unyielding construction, including edges l4 and2|. Suppose now that edge 2| is lifted even slightly away from cuttingposition. It will be apparent that if edge 2| is movable in path 33, andin that path only, any lifting of it however slight must be in a paththat is partially blocked by one or another of peripheral cutters i4,since the work material is forced by the presence of the cutter l4 intoencroaching upon the path that edge 2| must take. The lifting movementcan be made only by backing away the blocking cutter. It will thereforebe resisted by the entire force exerted through this cutter. A similarresistance will result if the work material consists of beard-ends,except that in that case it will be measured by the resistance of thework material to cutting. Whether great in degree or small, theresistance will be encountered. Even a tighter wedging of work materialalready compressed between the shearing cutters constitutes aresistance.Comparison is asked between this blocking action of cutter l4 and thecontrasting action of the same cutter in the same position, if insteadof path 33 the stationary cutting edge were movable in a path meetingpath 34 at an obtuse angle, such as path 0 in Fig. 8. In such case theseparation of the cutters would not be resisted, but facilitated. I

It will be noted again that shaft 3| is shown in the drawings as havinga supporting position forward of the shearing line. 'While the angularrelationship between paths 33 and 34 is not affected by a forward asagainst a rearward positioning, and I do not limit myself to either, theforward positioning shown affords movement by edge 2| in a path that isconcavely adjacent to blocking cutter M and that is therefore moreeffectively blocked thereby.

It will be noted also that the movements referred to of edge 2i aresmall movements, the pressures referred to chiefly small pressures, theresistances chiefly small resistances.

Fold-bach-The constructions described, embracing forwardly-positionedflexing devices, perform a further function that adds to the usefulnessof the mechanism as a whole, by providing a means by which thestationary cutting edge 21 can be lifted away from rotary cutting memberI for cleaning or inspection purposes, at a touch, without alteringadjustments or pressures, and then replaced at a touch, axle or shaft 3Iaffording the larger movement.

Positioning.-To maintain stationary cutting member 2 in operativeposition I make use of light springs 36, which bear upon extensions 3'!on arms 32 and are fixedly attached on strut 9 on frame-plates l and 8.Springs 35 also serve to hold member 2 in lifted position, and in theoperative position of member 2 serve to press edge 2| toward cutters I lwith constant pressure, thus acting as convenient pressure agencies inuses requiring both constant and variable contact pressure. The pressureafforded is light and is not attended with great friction. By

employing other positioning agencies their use i as such can bedispensed with.

Safety latch.The safety feature provides against injury through theaccidental displacement of member 2 or its cutting edge, and in additioncan be used as a positioning agency. If employed with springs 36 itenables lighter springs to be used, by eliminating the safety factor.Its construction in the form shown comprises a movable latch 39 attachedupon rockshaft 40, which is journaled at either end in frame-plates Iand 8 under the control of a friction-washer II; The lip of the latch isindicated at 42; it projects forwardly to enter an aperture 43 in blade2i when shaft 48 is rocked, and into a similar aperture 44 in linetherewith in blade-support 22 of member 2. In addition to its use as asafety provision and as a positioning means it provides a positive meansof preventing displacement of blade 20 upon supporting portion 22through an accidental slackness of finger-nuts 23. It will be understoodthat the latch does not clamp edge 2! against member I, but permits aslight free-play thereof in path 33. It is operable at a touch.

Trash receptacle.A trash-tray 45 is provided to add to the convenienceof the mechanism. It is formed of sheet metal and is removably supportedupon shafts SI and 48 by means of tongues 46 and turned-over lip 48. Thetray catches beard-ends and cuttings after their centrifugal ejection bymember I. a

The modifications-The variant forms of portions of the mechanismdescribed illustrate both its construction and its action. Thus theflexing devices of Fig. 4, comprising thin, flexible Ill) cross-supports22 of member 2. The flexing position in this case is established bymember I, upon peripheral portions of which the flexible devices havesliding contact. The flexing action affords stationary cutting edge 2|movement broadwise in a path meeting the path of peripheral cutters M ata high acute angle. The slight resilience of the flexing material inthis case is employed to urge member 2 toward member I, safety latch 39making such positioning use practicable.

The flexing devices shown in Fig. 5 comprise arm supports 32 connectedto cross-portion 22 of member 2, projecting pins or axles 3| on said armsupports, and link-shaped bearings 30 in raised bosses 50 onframe-plates I and 8, axles 3I being held against the working ends ofsaid bearings through the pressure of springs 36 against arm extensions31. The axis of flexion thus established affords movement broadwise byedge 2| in a path meeting the path of peripheral cutters I4 at an acuteangle. The construction enables member 2 to be removed or replaced as aunit, arms and all, without the use of tools, an advantage, in someuses, in addition to performing the variable pressure and variableresistance functions described.

The variant forms of rotary member I shown in Figs. 12 and 13 at I and Iare described and claimed more broadly in my patent and copendingapplication for patent earlier referred to. In Fig.12 peripheral cuttersI 4 are shown as extending obliquely along member I flush With andinterrupting bearers I5 In the construction shown in Fig. 13, cutters I4are shown as extending obliquely along rotary member I embeddedtransversely of bearer surfaces I5 at even height therewith or veryslightly higher@ In both cases the cutters and bearers perform thefunctions of cutters I4 and bearers I5, and either rotary member can besubstituted for rotary member I.

Operation-The mechanism described can be employed using any convenientshaving stroke, straight or diagonal, either with edge 2| leading orwith it trailing, without danger of injury. The bearers are preferablydisposed obliquely as shown in order to distribute their slight frictionover changing surfaces, but need not be. In the forms shown, as thenarrow stationary blade passes over the face the bearers weave acrossthe skin surfaces, supporting them at cutting level, at the same timemarshaling beard-ends into recesses 6 for cutting, and cutters I4cooperate with edge 2| in the cutting action at skin level; whereuponcutting members I and 2 are automatically urged together during thecutting moment, intermittently, again and again, with the pressureneeded, and their separation is independently'resisted, againautomatically and intermittently. If member I be left running even athigh speed between strokes no heat of friction results, except that dueto the pressure of the positioning spring, which is slight, and whichcan be eliminated by employing the safety catch as a positioning agent.This is not true of devices employing constant spring pressure. Ihedecrease in wear makes possible the use of a thin cutting edge like edge2| in practice, and at skin level, at any desired high speed. Themechanism works evenly, leaving no swatches of beard uncut, and itsnarrow form enables it to be used with ease in places not readilyaccessible to broader cutting blades,

Having clearlydescribed my invention, I claim ,as new and desire tosecure by Letters Patent:

1. 'In a shaving mechanism. comprising cooperating revoluble andstationary shear members supported in "line contact and operating meanstherefor, in combination; cooperating shear members adapted to operatein contact line adjacence in sliding relationship, one of the membersbeing revolubly supported upon bearing devices and one being stationary,the revoluble member being connected to rotating means, said members.having cooperating cutting portions thereon and having contact portionsflush with the cutting portions, the cutting portions of the revolublemember havin edges facing in movement direction; and means adapted tourge one of the members toward the other with pressure 2. In a shavingmechanism comprising cooperating rotary and stationary cutting membersand supporting structure therefor, in combination: rotary and stationarycutting members in contact shearing adjacence; and means urging one ofsaid members toward the other With increased pressure during the cuttingaction, said means including edged cutting structure on the rotarymember, a longitudinally-extending cutting edge on the stationarymember, and movement-affording supports connected to the stationarymember, said supports having positions affording movement broadwise bythe stationary cutting edge in a path meeting the path of the rotarycutting structure at an acute angle the vertex of which lies in thedirection of rotation of sai structure.

3. In a shaving mechanism comprising cooperating rotary and stationarycutting members and cutting edge in a path meeting the path of theperipheral cutters obliquely, at an angle under 90 but not under 20. I

4. In a shavin mechanism'comprising cooperating rotary and stationarycutting members and supporting structure therefor,- in combination: arotary cutting member having peripheral cutters thereon; a stationarycutting member having a cutting position adjacent to the path of saidcutters; and axle-and-bearing devices connected supportingly to thestationary member, said devices having positions affording movementbroadwise by the cuttin edge of the member in a path meeting the path ofthe peripheral cutters obliquely, at an angle under 90 but not under 20.

5. In a shaving mechanism comprising cooperating rotary and stationarycutting members and supporting structure therefor, in combination:rotary and stationary cutting members mounted in shearing adjacence; andmeans variably reports extending forwardly from either end of thestationary member beyond the cutting edge, and hinged devices connectedto the arm supports,

said devices having positions affording movement broadwise by thestationary cutting edge in a path variably blocked by the peripheralcutters while cutting.

6. In a shaving mechanism comprising cooperating rotary and stationarycutting members and supporting structure therefor, in combination: arotary cutting member having peripheral cutters thereon; a stationarycuttin member having a longitudinally-extending cutting edge and havingarm supports at either end extending forwardly-beyond the cutting edge;and axle-andbearing devices connected to the arm supports, said deviceshaving positions affording movement broadwise by the cutting edge in apath meeting the path of the peripheral cutters at an acute angle.

7. In a shaving mechanism comprising cooperating rotary and stationarycutting members and supporting structure therefor, in combination: arotary cutting member having peripheral cutters thereon; a stationarycutting member having a longitudinally-extending cutting edge and havingarm supports at either end extending forwardly past the cutting edge;spring devices urging the cutting edge toward the peripheral cutters;and axle-and-bearing devices connected to the arm supports, said deviceshaving positions affording movement broadwise by the cutting edge in apath meeting the path of the peripheral cutters at an angle under 8. Ina shaving mechanism comprising cooperating rotary and stationary cuttingmembers and supporting structure therefor, in combination: a rotarycutting member having peripheral cutters thereon; a stationary cuttingmember.

having a longitudinally-extending cutting edge and having arm supportsat either end extending forwardly beyond the cutting edge; andsupporting devices having portions fashioned of thin flexible materialconnected to the arm supports, said devices having positions affordingmovement broadwise by the cutting edge in a path meeting the path of theperipheral cutters at an acute angle.

9. In a shaving mechanism comprising cooperating rotary and stationarycutting members and supporting structure therefor, in combination: astationary cutting member having a longitudinally-extending cuttingedge, and having forwardly extending arm supports at either end, andhaving bearing devices on said arms, said bearing devices having bearingsurfaces in positions forward of and parallel to said cutting edge,whereby to change the direction of the cutting pressure exerted thereon.

10. In a shaving mechanism comprising cooperating rotary and stationarycutting members and supporting structure therefor, in combination: astationary cutting member having a longitudinally-extending cutting edgeand having forwardly-extending arm supports at either end, and axledevices projecting from said arm supports, said devices having axispositions forward of and parallel to said cutting edge, whereby tochange the direction of the cutting pressure exerted thereon. I V

11. In a shaving mechanism comprising coopsisting the separation of saidcutting members, io-erating rotary and stationary cutting members 11 andcutting structure therefor, in combination: a stationary cutting memberhaving a longitudinally-extending blade-supporting portion, threadedstuds thereon, a removable blade of L section having openings in thedownstanding Wall portion for the studs, forwardly-extending armsupports at either end, and flexing devices con nected to the armsupports, said devices having a longitudinally-extending axis offieXion.

12. As an article of manufacture, for use in a shaving mechanismemploying cooperating rotary and stationary cutting members: a cuttingblade of L section having a plate-like longitudinallyextending edgedportion angularly joined upon a longitudinally-extending plate-like wallportion, the Wall portion having openings therein for projecting studs.

WILLIAM JONATHAN NEIDIG.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,174,706 Fusch Mar. 7, 19161,730,004 Gregson Oct. 1, 1929 1,886,273 Thomson Nov. 1, 1932 1,981,202Shipman Nov. 20, 1934 2,186,092 Benner Jan. 9, 1940 2,319,916Breitenstein May 25, 1943 2,367,686 Neidig Jan. 23, 1945 FOREIGN PATENTSNumber Country Date 204,018 Switzerland July 1,1939

